Read the following statements and select the correct answer.
Statement I - Silk is made of proteins.
Statement II - The secretions produced by silkworm harden to form cocoons, when exposed to air.

Statement I is correct and statement II is incorrect.

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Statement I is incorrect and statement II is correct.

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Both statements I and II are correct.

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Both statements I and II are incorrect.

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Solution

The correct option is C Both statements I and II are correct.
Silk is an animal fibre obtained from the cocoon of a silkworm, made from proteins. Once the caterpillars are fully grown, they move their head in the pattern of figure eight to spin the cocoon around them. The secretion that is produced by the silkworm during this process hardens to form a cocoon, when exposed to air.

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The caterpillar secretes fibre which hardens on exposure to air and becomes silk fibre. The fibre secrets by caterpillar are made from:

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